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Gewählte Master / Diploma Thesis:

Valentin Weixelbaumer (2019): MIKROKLIMATISCHE VERHÄLTNISSE IM PHOTOVOLTAIK-DACHGARTEN Aufenthaltsqualität in einem Dachgarten mit Überdachung aus lichtdurchlässigen Photvoltaikmodulen.
Master / Diploma Thesis - Institut für Ingenieurbiologie und Landschaftsbau (IBLB), BOKU-Universität für Bodenkultur, pp 94. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Within the research project “Photovoltaic roof garden” a concept was developed to create synergies for health and comfort by combining a roof garden with photovoltaics, which create a comfortable shelter on a roof terrace. The basis for the study was the thesis that the pergola-like PV shelter extends the time when it is comfortable to stay on a rooftop terrace. The aim of this paper is to find out: a) how the photovoltaic panels influence the solar irradiation within the PV roof garden; b) how the combination of green roof and photovoltaics influences air temperature; and c) how human comfort conditions under the PV shading can be described. At the University of Natural Resources and Life Science, Vienna, 60 m² of translucent PV panels were installed on a pergola-like sub construction (height about 2,5 m). Underneath two green roof fields and a resting zone were built. Measurements of downward and upward, shortwave and longwave radiation, air temperature, humidity and wind speed were taken within this test facility over a period of one year. The data was compared with measurements on a bare flat roof. Universal Thermal Climate Index (UTCI) was calculated for both locations and the figures were compared. The analysis showed a) that there is a drop in solar irradiance below the PV panels; b) that the combination of green roof and photovoltaics does not have a significant impact on air temperature; and c) that the diurnal UTCI amplitudes were decreased below the PV leading to a better thermal comfort compared to the flat roof. For example thermal stress is reduced on a hot day and on a cold day it feels warmer under the photovoltaic shelter than on the bare terrace. The study shows that the combination of PV and green roof on a rooftop terrace is increasing thermal comfort in an eco-social way, which allows a holistic solution with respect to sustainable urban planning. Furthermore a survey among users has found an overall high acceptance of the PV roof garden.

Beurteilende(r): Pitha Ulrike
1.Mitwirkender: Zluwa Irene

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